Also, typical soil resistivity meters – which work on low voltage and substantial frequency – are only dependable for electrode spacings up to 15 meters in most soils, as well as a highest of thirty meters.
Measurements will replicate the historical local weather in the region, as resistivity of the soil is impacted by temperature. As reviewed while in the Seasonal Analysis for Grounding Methods webinar this temperature variation might have sizeable results to the grounding technique impedance, specifically in colder regions that have freezing towards the depth with the grounding method.
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Incomplete soil resistivity analysis may cause an inaccurate grounding process design [19]. As a result, soil resistivity is among the contributing variables to your inefficiency of electric power technology as it can induce high impedance on electrical energy stream from PV modules to inverters. ...
The most widely employed method for soil resistivity testing, the Wenner four-point method requires positioning 4 equally spaced probes during the ground and injecting current in the outer probes while measuring voltage through the interior probes. This facts assists work out the soil’s resistivity.
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C1 & C2 tend to be the outer probes and P1 & P2 will be the inner probes. At this time, a recognized recent is utilized across probes C1 & C2, when the ensuing voltage is calculated across P1 & P2. Ohm’s law can then be placed on determine the measured apparent resistance.
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